Pettit Lake is a large alpine lake in Blaine County, Idaho, United States, located in the Sawtooth Valley in the Sawtooth National Recreation Area. The lake is approximately 16 miles (26 km) south of Stanley and 33 miles (53 km) northwest of Ketchum.

Quick Facts Location, Coordinates ...

Pettit Lake
Pettit Lake
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Location	Blaine County, Idaho
Coordinates	43°59′N 114°53′W
Type	Glacial
Primary inflows	Creek from Alice Lake
Primary outflows	Creek to Alturas Lake Creek to Salmon River
Basin countries	United States
Max. length	1.40 mi (2.25 km)
Max. width	0.55 mi (0.89 km)
Surface elevation	6,996 ft (2,132 m)

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Pettit Lake is accessed from State Highway 75 via Sawtooth National Forest road 205.^[1] There are campgrounds and trailheads around Pettit Lake.

In the southern section of the Sawtooth Valley, Pettit Lake is the third largest lake in Sawtooth National Recreation Area. Just east of the Sawtooth Wilderness, Pettit Lake is at an elevation of 6,996 feet (2,132 m), downstream of popular destinations such as Alice Lake and the Twin Lakes.